Principles of Operation

PRINCIPLES OF OPERATION

The smart junction box (SJB) monitors the door ajar switches (they are open with the door closed and closed with the door open), the hood ajar switch (closed with the hood closed and open with the hood open) and the luggage compartment lid/liftgate ajar switch (open with the luggage compartment lid/liftgate closed). When the SJB receives a signal from one or more of the monitored switch(es) indicating unauthorized entry into the vehicle, the SJB intermittently (in regular intervals) grounds the horn relay and also intermittently (in regular intervals) sends voltage to the turn signal lamps. The horn relay closes, supplying voltage to the horn. The SJB cycles the ground to the horn relay and voltage to the turn signal lamps, on and off, while the system is activated.